LSE toolsLSE toolsCrowbar (326)Crowbar (326)

Tool and Usage

Crowbar is a brute forcing tool that can be used during penetration tests. Unlike other similar tools it uses different methods to achieve its goal.

Screenshot for Crowbar tool review

Why this tool?

While most brute forcing tools take a similar approach, Crowbar can use different methods that are not always available in other utilities. For example, Crowbar can use SSH keys, instead of the typical username and password combination. This might be useful during penetration testing when these type of details are discovered.

Background information

Crowbar was formally known as Levye.

Usage and audience

Crowbar is commonly used for penetration testing. Target users for this tool are pentesters.

Tool review and remarks

The review and analysis of this project resulted in the following remarks for this security tool:


  • + The source code of this software is available

History and highlights

  • Demoed at Black Hat USA 2014
  • Demoed at Black Hat USA 2015

Author and Maintainers

Crowbar is under development by Gökhan Alkan.


Supported operating systems

Crowbar is known to work on Linux.

Crowbar alternatives

Similar tools to Crowbar:



The known_hosts_bruteforce is a script to discover hostnames from the known_hosts file. This can be useful during penetration testing or incident response.



The acccheck tool performs a password guessing and dictionary attack on SMB services used to share files and printers.



Eapmd5pass is a password attack tool for EAP-MD5 authentication traffic. It uses an offline attack, meaning it deals with captured network data.

See all alternatives tools for Crowbar »

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Project details
Latest releasev.3.4 [2016-01-20]

Project health

This score is calculated by different factors, like project age, last release date, etc.


GitHub iconCrowbar


This tool is categorized as a brute force tool and password security tool.

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